Bobbin-winder for sewing-machines



(No Model); l 2 sheets-sheet 1.

C. H. BOPP. BOBBIN WNDERPOR SWING MACHINES.

Patented Deo-.12, 1m32.`

(No Model.) -2 Sheets-'Sheet 2.

' o; H. vElo-P12.

'BoBBIN WINDBR PoR SEWING-mummia;

1To.268,896. Patented Dec. 12. 11882;

www l UNITED STATES PATENT OFFICE@ onAELEsH'. HOPE, OE OHIoAeo, ILLINOIS.

BOBBIN-WINDER FQR SEWING-MACHINES.

`SIE-ECIFIGATIONv forming part of Letters Patent No. 268,896, dated December 12, 1882.

` Application tiled September 16, 1882. (No model.)

y 4, a side view thereof when out of contact with the band-wheel; Fig; 5, an end view thereof.

. with.

The object of my invention is to provide a bobbin-winding mechanism for use with sewing-machines which shall be self-acting in its provisions of tension to secure the even winding of the thread in the bobbin and stoppage ot' winding when the bobbin is full, with a cutting device, to sever the thread, upon the latch-lever which throws the bobbin-winding mechanism out of gear.

A representsthe hase as secured to a sewing-machine table by screws a a; B, the Inovable frame thereof supporting the bobbin, worm-shaft, tension-spring, and latch-lever; C, the bobbin; D, the worin and its shaft; E, the worm-wheel; F, the 1atchlever; G, its spring; H, theA threadcheck; I, the framestud; J, the-frame-spring; K, the adjustingspring; L, the bobbin-spindle; M, the rubberwheel; O,thelatchleverscrew; P,theshoulder on base A; R, the band-wheel of a sewingmachine.

The operation of these parts is as follows: Base A being secured to the table of a sewingmachine by screws a a, rubber wheel M is brought into contact with band-wheel R, and the short arm of latch-lever F catches upon shoulder P of base A. The revolution of band, wheel R rotates rubber wheel M, connected with shalt and worm D, engaging with wormwheel E upon bobbin-spindle L. The long arm of' latch-lever F lies within the disks of bobbin C, held there by spring G. As the thread coming through thread-check H is wound upon bobbin C, it gradually fills the space between the disks until its body presses out the longer arm of latchlever F, thereby releasing the shorter arm from shoulder P, and frame-spring J raises the forward end of trame B-,therebydestroying the contact between rubber wheel M and band wheel R.

rIhe lower edge ot' the long arm of latchlev`er F is a cuttingfedge, and the operator may now sever the thread by drawing it across the same.

Thread-check H is provided with a disk and spring, common to sewing-machines, whereby sufficient tension is obtained upon the thread to secure its even and regular winding upon the bobbin.

To secure elasticity in the action ot' wheels R and M, tending by their rigidity to cut rubber wheel M or break latch F, that part of frame B which supports rubber wheel M and wormshaft D is allowed to rock slightly upon framestnd I, being held in position by adjustingspring K, which allows worm D to rise and fall slightly (see Fig. 7) in its engagement with worm-wheel E, and thereby compensatingly relieve the pressure upon rubber wheel M.

What l claim as my invention, and desire to secure by Letters Patent, is

The combination of base A, provided with shoulder P, frame B, having the rubber wheel `and worm-supporting part thereof adapted to rock slightly, bobbin C, latch-lever F, and thread-check H, with worm D and worm-wheel E, operating together by means of' the springs and connections shown, substantially as and for the purpose described.

CHARLES H. HOPP.

Witnesses MARTIN BEEM, CHARLES MASON. 

